Abstract

Sequential pretreatment using different NaOH concentrations (0.5%, 1.0%, 1.5%, w/w) and 1% H₂SO₄ (w/w) was evaluated as a strategy for effective hydrolysis of rice straw. The efficiency of sequential NaOH and H₂SO₄ (SNA) pretreatment against sequential H₂SO₄ and NaOH (SH) was assessed. SH pretreated biomass attained more sugar yield compared to SNA pretreated biomass. The sugar yields from pretreated biomass improved with increasing NaOH concentration in both SH and SNA treatments. The maximum sugar release of 40.6 mg/ml (83.2% efficiency) was obtained from SH pretreated biomass when the stage 2 alkali treatment was performed at 1.5% w/w NaOH. The non-detoxified hydrolysate from this biomass was fermented with 96.8% efficiency.

摘要

_{使用不同 NaOH 浓度（0.5%、1.0%、1.5%、w/w）和 1% H 2} SO ₄ (w/w)的顺序预处理作为有效水解水稻秸秆的策略进行了评估。_{序贯 NaOH 和 H 2} SO ₄ (SNA) 预处理对序贯 H ₂ SO ₄的效率并评估了 NaOH (SH)。与 SNA 预处理的生物质相比，SH 预处理的生物质获得了更多的糖产量。在 SH 和 SNA 处理中，预处理生物质的糖产量随着 NaOH 浓度的增加而提高。当在 1.5% w/w NaOH 下进行阶段 2 碱处理时，从 SH 预处理的生物质中获得 40.6 mg/ml（83.2% 效率）的最大糖释放。来自该生物质的未解毒水解产物以 96.8% 的效率发酵。